public class xiti2_6{
  public static void main(String[] args) {
    int [] a ={10,20,30,40}, b[]={{1,2},{4,5,6,7}};
    b[0]=a;
    b[0][1] = b[1][3];
    System.out.println(b[0][3]);    //代码1
    System.out.println(a[1]);   //代码2
  }
}

